Issai is a very rare variant of Isai that was most common in the 2000s and has all but disappeared.
Issai is a boy name. It last appears in U.S. records in 2016. Issai first appears in 1990 and peaked in 2006 (14 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2016 | 6 | 6 | #11,258 |
| 2012 | 7 | 7 | #10,127 |
| 2011 | 5 | 5 | #13,057 |
| 2010 | 6 | 6 | #11,272 |
| 2008 | 7 | 7 | #10,303 |
| 2007 | 5 | 5 | #13,100 |
| 2006 | 14 | 14 | #5,896 |
| 2004 | 10 | 10 | #7,190 |
| 2002 | 9 | 9 | #7,270 |
| 2001 | 5 | 5 | #11,244 |
| 2000 | 5 | 5 | #11,059 |
| 1998 | 7 | 7 | #7,903 |
| 1990 | 5 | — | #8,648 |